The structure of diffusion flames burning pure, binary, and ternary solutions of methanol, heptane, and toluene

Journal Article · Mon Jun 01 04:00:00 EDT 1987 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(87)90006-X· OSTI ID:6436539

Hamins, A; Seshadri, K

The structure of counterflow diffusions flames burning heptane, toluene, binary solutions of methanol and toluene, and heptane and toluene, and ternary solutions of methanol, heptane, and toluene is characterized in the vicinity of extinction. Composition profiles of stable species were measured in these flames by use of gas sampling with quartz microprobes and analyzed by use of on-line, two column gas chromatography. Temperature profiles were measured by use of coated thermocouples. A number of compounds were observed during pyrolysis of the fuel. Experimental results were analyzed by using the mixture fraction (conserved scalar) as the independent variable. Results show that for a diffusion flame burning heptane the approximation that the Lewis numbers for all species are approximately equal to unity is valid. When the composition profiles for major chemical species and temperature profiles are plotted with mixture fraction as the independent variable, the maximum value of the concentration of the major stable species and the maximum value of the temperature were found to occur on the rich side of stoichiometry.

• Research Organization: Dept. of Applied and Engineering Sciences/Chemical Engineering, Univ. of California, San Diego, La Jolla, CA 92093
• OSTI ID: 6436539
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 68:3; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
025000* -- Petroleum-- Combustion
090210 -- Alcohol Fuels-- Properties-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALCOHOLS
ALKANES
ALKYLATED AROMATICS
AROMATICS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COMBUSTION KINETICS
DATA ANALYSIS
DECOMPOSITION
DIFFUSION
DISPERSIONS
FLAME PROPAGATION
FLAMES
FUELS
GAS CHROMATOGRAPHY
GRAPHS
HEPTANE
HYDROCARBONS
HYDROXY COMPOUNDS
KINETICS
LIQUID FUELS
MEASURING INSTRUMENTS
METHANOL
MIXTURES
ORGANIC COMPOUNDS
PYROLYSIS
REACTION KINETICS
SEPARATION PROCESSES
SOLUTIONS
STOICHIOMETRY
TEMPERATURE GRADIENTS
TEMPERATURE MEASUREMENT
THERMOCHEMICAL PROCESSES
THERMOCOUPLES
TOLUENE